Last fall I changed the battery on my truck. AC worked great prior to changing it. After the new battery was put on now it only blows heater air. Even with the blower turned off. Help please..

 

Sounds like the controller is stuck.

Might try disconnecting the battery for a couple of min and see if that brings it back, but thats a shot in the dark.

 

Didnt work. Ty tho.

 

You might see if you can find another hvac controller to test it.

If you're shutting the fan off and it's still blowing, it's obviously not sending the right signals.

The other option but I'm not too sure your symptoms match, but the blend door is a common issue to consider too.